<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
	<title></title>
	<script type="text/javascript" src='jquery-1.7.2.min.js'></script>
	<script type="text/javascript">
       $(document).ready(function(){
       	$('#dawang_tiaozhuan').change(function(){
       		var checkValue=$(this).val();  //获取Select选择的Value 
       		//alert(checkValue);
       		if (checkValue=='baidu') {
       			window.location.href ="http://www.baidu.com";
       		} else if(checkValue=='tengxun'){
                window.location.href ="http://www.qq.com";
       		} else if(checkValue=='xinlang'){
       			window.location.href ="http://www.sina.com";
       		} else if(checkValue=='wangyi'){
       			window.location.href='http://www.163.com';
       		};
       	})
       })
	</script>
</head>
<body>
	<form action="">
		<select name="dawang" id="dawang_tiaozhuan">
			<option value="baidu">百度</option>
			<option value="tengxun">腾讯</option>
			<option value="xinlang">新浪</option>
			<option value="wangyi">网易</option>
		</select>
	</form>
</body>
</html>